/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.pipeline.stage;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.apache.commons.pipeline.StageException;

/**
 * Breaks up an InputStream by line and exqueues each resulting line.
 */
public class InputStreamLineBreakStage extends BaseStage {
    /**
     * Holds value of property ignoringBlankLines.
     */
    private boolean ignoringBlankLines = false;
    
    /** Creates a new instance of InputStreamLineBreakStage */
    public InputStreamLineBreakStage() {
        super();
    }

    /** Creates a new instance of InputStreamLineBreakStage */
    public InputStreamLineBreakStage(boolean ignoringBlankLines) {
        this.ignoringBlankLines = ignoringBlankLines;
    }

    public void process(Object obj) throws org.apache.commons.pipeline.StageException {
        InputStream is = (InputStream) obj;
        try {
            InputStreamReader reader = new InputStreamReader(is);
            BufferedReader buffered = new BufferedReader(reader);
            String line = buffered.readLine();
            while (line != null){
                if (!(ignoringBlankLines && line.trim().equals(""))) {
                    this.emit(line);
                }
                line = buffered.readLine();
            }
        } catch (IOException e){
            throw new StageException(this, e);
        }
    }

    /**
     * Getter for property ignoreBlankLines.
     * @return Value of property ignoreBlankLines.
     */
    public boolean isIgnoringBlankLines()  {
        return this.ignoringBlankLines;
    }

    /**
     * Specifies that this stage will not exqueue blank lines.
     * @param ignoreBlankLines New value of property ignoreBlankLines.
     */
    public void setIgnoringBlankLines(boolean ignoringBlankLines)  {
        this.ignoringBlankLines = ignoringBlankLines;
    }
}
